How do I ask wheiter he finished the script call? in a herbalism system

[Eagleeye1990]

Hello follks. Im in need of your help. Im using a hebalism minigame like system which the player must to try to get a flower out in order to get a item. If you cut a root. you lost the minigame and you cant get the item. The problem is: I want the event to be deleted once you achieved to get the item. Because it doesnt delete by itself. The best way would be, I could ask due condinational branch wheiter the script is finished any use a variable to close the event. But I dont know how to and with which command. I hope you understand my problem. Just download the demo and talk to the two pflants which are next to each other. ignore the other events i just wanted to test it. Remember: I need to do this again und again so make sure it can be used as much as possible.
I posted the system below.